We now know that chloroplasts are derived from which group of free-living organisms?

a. mitochondria
b. algae
c. cyanobacteria
d. archaea


c. cyanobacteria

Biology & Microbiology

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Which researchers showed that DNA is the genetic material?

A) Watson and Crick B) Hershey and Chase C) Garrod and Griffith D) Meselson and Stahl

Biology & Microbiology

Which part of the sperm contains the chromosomes?

A. flagella B. tail C. middle piece D. cell membrane E. head

Biology & Microbiology

A monosomic cell would produce gametes with how many chromosomes?

A) N B) N and N-1 C) N-1 D) N+1 E) N and N+1

Biology & Microbiology

Which radical idea did Cuvier propose based on his studies of Earth’s history??

a. extinction of species
b. evolution of species
c. Earth as billions of years old
d. an unchanging Earth
e. static species composition

Biology & Microbiology